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We found 5 dictionaries that define the word Helion:

General (3 matching dictionaries)
  1. Helion: Wordnik
  2. helion: Wiktionary
  3. Helion (chemistry), Helion (magister officiorum), Helion (meteoroid), Helion: Wikipedia, the Free Encyclopedia

Computing (1 matching dictionary)
  1. helion: Encyclopedia

Tech (1 matching dictionary)
  1. Glossary of Meteorology (No longer online)

Definitions from Wiktionary (helion)

noun:  (physics) A helium ion, the nucleus of a helium-3 atom. Formula: ³He⁺² ; Symbol: h

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